Improved Interfacial Bonding Strength and Reliability of Functionalized Graphene Oxide for Cement Reinforcement Applications |
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| Authors: | Dr Nan Wang Dr Shuping Wang Prof Luping Tang Dr Lilei Ye Björn Cullbrand Abdelhafid Zehri Dr Behabitu Ergette Tebikachew Prof Johan Liu |
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| Institution: | 1. Electronics Materials and Systems Laboratory (EMSL), Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, 412 96 Göteborg, Sweden;2. College of Materials Science and Engineering, Chongqing University, 174 Shazheng Rd, Shapingba District, Chongqing, 400045 P.R. China;3. Division of Building Technology, Department of, Architecture and Civil Engineering, Chalmers University of Technology, Sven Hultins gata 6, 412 96 Göteborg, Sweden;4. SHT Smart High Tech AB, Kemivägen 6, 412 58 Göteborg, Sweden;5. Centrum Pile AB, Kollanda 110, 446 95 Älvängen, Sweden;6. Department of Chemistry and Chemical Engineering, Applied Chemistry Division, Chalmers University of Technology, 412 96, Gothenburg, Sweden |
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| Abstract: | Poor bonding strength between nanomaterials and cement composites inevitably lead to the failure of reinforcement. Herein, a novel functionalization method for the fabrication of functionalized graphene oxide (FGO), which is capable of forming highly reliable covalent bonds with cement hydration products, and therefore, suitable for use as an efficient reinforcing agent for cement composites, is discussed. The bonding strength between cement and aggregates was improved more than 21 times with the reinforcement of FGO. The fabricated FGO also demonstrated many important features, including high reliability in cement pastes, good dispersibility, and efficient structural refinement of cement hydration products. With the incorporation of FGO, cement mortar samples demonstrated up to 40 % increased early and ultimate strength. Such results make the fast demolding and manufacture of light constructions become highly possible, and show strong advantages on improving productivity, saving cost, and reducing CO2 emissions in practical applications. |
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| Keywords: | cement surface functionalization graphene interfaces nanomaterials |
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